Hamas kills 40 in unprecedented, wide-ranging incursion into Israel. Netanyahu says ‘we are at war’

The ruling Hamas militant group in the Gaza Strip carried out an unprecedented attack on Israel at daybreak Saturday, firing thousands of rockets as dozens of fighters infiltrated the heavily fortified border in several locations by air, land and sea, catching the country off guard on a major holiday.

Several hours after the invasion began, Hamas militants were still fighting gunbattles inside several Israeli communities in a surprising show of strength that shook the country. Israel’s national rescue service said at least 40 people have been killed and hundreds wounded,...